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Haemagglutination of twitching Streptococcus sanguis
Acta Pathologica Et Microbiologica Scandinavica. Section B, Microbiology
|December 1, 1976
Summary
This study investigated Streptococcus sanguis haemagglutination. Most strains showed agglutination of guinea pig erythrocytes, with some requiring horse serum, indicating varied growth medium effects.
Area of Science:
- Microbiology
- Bacteriology
Background:
- Streptococcus sanguis is a common oral bacterium.
- Haemagglutination by S. sanguis can be influenced by growth conditions and bacterial morphology.
- Understanding these factors is crucial for studying bacterial interactions and pathogenesis.
Purpose of the Study:
- To investigate the haemagglutination properties of Streptococcus sanguis strains.
- To determine the influence of growth media and bacterial fimbriation on haemagglutination.
- To assess the association between twitching motility and haemagglutination in S. sanguis.
Main Methods:
- Cultivation of 86 Streptococcus sanguis strains in Todd-Hewitt broth (TH) and TH with 10% horse serum (THS).
- Testing for agglutination of guinea pig erythrocytes (GPE).
- Observation of bacterial twitching motility and fimbriation.
- Testing haemagglutination with various erythrocyte types and assessing mannose sensitivity.
Main Results:
- 55 out of 86 strains agglutinated GPE in TH; 21 required THS.
- Two positive strains were non-twitching and unfimbriated.
- Haemagglutination was observed in both twitching and non-twitching strains.
- Differences in erythrocyte types tested showed only slight variations in agglutination.
Conclusions:
- There is no absolute association between twitching motility and haemagglutination in Streptococcus sanguis.
- Growth medium significantly impacts the haemagglutination ability of S. sanguis.
- Further research is needed to fully elucidate the mechanisms of S. sanguis haemagglutination.